From most every article I've seen since the Ramsey trade, Peters didn't fit the Rams/Son of Bum's defensive scheme, so why did they pick him up in the first place?

It has also been reported that the Rams were going to trade him regardless of whether they picked up Ramsey or not.

I understand that the team ultimately was successful, making it to the super bowl AND the price wasn't too high....BUT they took a chance on a guy with possible locker room/team issues for a player that just couldn't play man defense...it just seems odd to me.

Did they change much of the defensive scheme to match Peter's skill set?